KR101549592B1 - Heat wire cable for vehicle seats and manufacturing method thereof - Google Patents

Abstract

Heating cable for a vehicle seat according to the present invention includes: a heating cable array in which a plurality of unit heating cable is arranged and two adjacent unit heating cables contact each other to form a cavity a central member which is filled in the cavity and supports the heating cable array, and a sheath layer which surrounds the heating cable array. The unit heating cable includes a conductive line and an insulation sheath layer surrounding the conductive line.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a hot-wire cable for a vehicle seat,

The present invention relates to a hot-wire cable for a vehicle seat and a method of manufacturing the same.

Generally, a seat of an automobile is provided with a hot-wire cable which supplies electric current for the convenience of the driver and passengers and instantaneously flows a high current to generate heat. Such a hot-wire cable for a seat is bent and arranged in a zig-zag manner repeatedly in a seat, and is exposed to the risk of fire due to mechanical, chemical, or thermal stresses such as load on the passenger and vibration of the vehicle body.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 shows a hot wire cable for a generally used vehicle seat. Referring to FIG. 1, a conventional hot-wire cable 100 for a vehicle seat includes a tension member 3, a conductor line 1; A plurality of unit heating wires 11 made of an insulating coating layer 2 surrounding the conductor wire 1 and formed on an outer peripheral surface of the tension member 3; And a sheath layer (4) surrounding the plurality of unit heating wires (11). In the case of the hot-wire cable 100 for a vehicle seat, the flame-retarding prescription has been applied to the sheath layer 4 to prevent the above-described fire. Specifically, flame retardancy has been imparted by adding a flame retardant to the base resin of the composition for forming a cis layer. However, due to the flame retardant in the base resin, the extensibility of the hot-wire cable is lowered and the bending resistance is lowered. As a result, there is a risk that the product is stopped due to disconnection and the fire spreads to the entire sheet.

In addition, the conductor wire 1 of the existing hot-wire cable 100 is mainly made of copper, and the copper has a low durability such as bending property, so that disconnection occurs frequently. Particularly, ) Strands are loosened and separated to cause disconnection. As a result, there was a risk that the cable could be overheated and arcing due to such disconnection, causing a fire.

1 is a structure in which the sheath 4 is penetrated into the space between the inside of the conductor line 1 and the tension member 3 and the conductor wire 1 arranged in accordance with the warp or twist of the cable The circular shape of the conductor line 1 is deformed and the heat dissipation distribution through the heat line is unevenly distributed, and there arises a problem that frequent problems such as breakage or disconnection of the conductor line 1 occur frequently.

Furthermore, since the halogen-based compound used as the conventional flame retardant has a flame retarding mechanism for capturing radicals, the evaluation of the flame retardance of the wire is unsatisfactory, and the evaluation of the flame retardancy of the seat heater is unsatisfactory. The reason for this is that flames are not formed during flame retardation of the electric wire, and the flame is transferred to the nonwoven fabric. In addition, since harmful substances such as dioxins are generated at the time of burning after disposal, and antimony compounds are also pointed to carcinogenicity, a flame retardant that does not use them is required. In addition, when the flame retardant is contained in an excessive amount, the surface of the heat ray cable is roughened and the workability is lowered, and the frictional property between the heat ray cable and the nonwoven fabric increases during the sheet heater working, and the sheet heater is hardly arranged in a certain direction.

On the other hand, a polyamide (PA) based resin mainly uses a melamine based flame retardant. The melamine-based flame retardant can be used as a general polyamide wire or as a flame retardant in the production of an injection product, but it can not be used alone in a hot-wire cable for an automobile seat. This is because the seat heating cable itself can not satisfy the flammability as a seat heater even though it can satisfy the combustibility. In other words, even if the flame retardant evaluation standard is satisfied when the flame retardant is added to the ordinary electric wire, the combustion of the seat heater is affected by the electric wires, the nonwoven fabric and the thread included in the seat heater, will be. Therefore, in order to satisfy the flame retardancy of the seat heater, char formation and self-extinguishing must be performed when the hot-wire cable itself is burned. Further, when the flame retardant is added to the polyamide, it is necessary to solve the problem of preventing the elongation and the decrease of the flexibility.

SUMMARY OF THE INVENTION An object of the present invention is to provide a hot-wire cable for a vehicle seat excellent in flex resistance and flame retardancy.

Another object of the present invention is to provide a hot-wire cable for a vehicle seat having excellent processability and workability.

It is still another object of the present invention to provide a hot-wire cable for a vehicle seat, which has a uniform heat-dissipation distribution and is excellent in the maintenance of the internal arrangement structure.

It is still another object of the present invention to provide a hot-wire cable for a vehicle seat having excellent mechanical strength.

Another object of the present invention is to provide a hot-wire cable for a vehicle seat that is excellent in environmental friendliness, economy, and productivity.

It is still another object of the present invention to provide a method of manufacturing a hot-wire cable for a vehicle seat.

One aspect of the present invention relates to a hot wire cable for a vehicle seat. Wherein the heating cable for a vehicle seat includes a plurality of unit heating wires arranged in a row so that the unit heating wires contact the adjacent two unit heating wires to form a central diameter; A center member filled in the center diameter and supporting the heat wire arrangement; And a sheath layer surrounding the heating wire array, wherein the unit heating wire includes a conductor wire and an insulating coating layer surrounding the conductor wire.

In one embodiment, the sheath layer is formed from a first composition comprising (A) 100 parts by weight of a base resin and (B) 15 to 60 parts by weight of a flame retardant, wherein the base resin (A) Wherein the first resin (A1) comprises 70 to 95% by weight of a resin and (A2) 5 to 30% by weight of a second resin, wherein the first resin (A1) is a copolymer of tetrafluoroethylene-perfluoromethyl vinyl ether copolymer at least one of terafluoroethylene and perfluoromethyl vinyl ether (MFA), polytetrafluoroethylene (PTFE), polyamide (PA), thermoplastic polyester elastomer (TPEE), polyphenylene oxide (PPO) and polyethylene terephthalate Wherein the second resin (A2) is selected from the group consisting of thermoplastic polyurethane (TPU), thermoplastic polyurethane grafted maleic anhydride (Ma-g-TPU), polypropylene grafted maleic anhydride (Ma- -Propylene-diene-monomers (EPDM Styrene-butadiene-styrene (SEBS) and styrene-ethylene-butadiene-styrene grafted maleic anhydride (Ma-g-EPDM) SEBS), and the flame retardant (B) may include (B1) a phosphorus flame retardant and (B2) a melamine flame retardant.

In one embodiment, the polyamide (PA) may include one or more of PA6, PA10, PA11, PA12, PA610, PA410, PA1010 and polymers comprising an amide bond.

In one embodiment, the phosphorus flame retardant (B1) and the melanin flame retardant (B2) may be contained in a weight ratio of 1: 0.1 to 1:10.

In one embodiment, the second resin (A2) is selected from the group consisting of ethylene-propylene-diene-monomer grafted maleic anhydride (Ma-g-EPDM) and styrene-ethylene-butadiene-styrene grafted maleic anhydride ) At a weight ratio of 1: 0.5 to 1: 2.

In one embodiment, the first composition may further comprise (C) 0.1 part by weight to 10 parts by weight of the antioxidant and (D) 0.1 to 5 parts by weight of the lubricant, based on 100 parts by weight of the base resin (A).

In one embodiment, the antioxidant (C) comprises at least one of phenolic, phosphorus, sulfur, amine and metal antioxidants. The lubricant (D) may contain at least one of an ester, silicone, .

In one embodiment, the conductor wire includes at least one of an alloy wire, a copper wire, an interlocking wire, an interlocking wire, a coaxial aluminum wire and a coplanar wire. The wire may be formed of zinc (Zn), nickel (Ni) , Magnesium (Mg), tin (Sn), zirconium (Zr), and beryllium (Be).

In one embodiment, the insulating coating layer may be formed by coating the surface of the individual conductor lines, or may be formed by coating the surfaces of the plurality of conductor lines.

In one embodiment, the center member may comprise fibers in the form of a string, a double yarn or a poly yarn.

In one embodiment, the insulating coating layer is formed by varnish coating the surface of the conductor wire.

In one embodiment, the hot wire array includes a first hot wire array forming a central diameter and a second hot wire array contacting the first hot wire array, and the second hot wire array may be formed by arranging two or more unit hot wires .

In one embodiment, the second hot wire array may be one in which two or more unit hot wires are continuously arranged.

In another embodiment, the second hot wire array may be one in which two or more unit hot wires are discontinuously arranged.

In an embodiment, the plurality of unit heat wires are closely arranged so that two adjacent unit heat wires are in contact with each other, and the center member and the sheath layer may be separated from each other by the heat wire arrangement.

Another aspect of the present invention relates to a method of manufacturing a hot-wire cable for a vehicle seat. The method for manufacturing a hot-wire cable for a vehicle seat includes the steps of: Arranging the unitary heating wires on the outer surface of the center member so as to contact with adjacent two unit heating wires to form a heating wire arrangement; And forming a sheath layer surrounding the hot wire array, wherein the unit hot wire includes a conductor wire and an insulating coating layer surrounding the conductor wire.

In one embodiment, the sheath layer is formed using a first composition comprising (A) 100 parts by weight of a base resin and (B) 15 to 60 parts by weight of a flame retardant, wherein the base resin (A) (A) comprises 70 to 95% by weight of a resin (A) and 5 to 30% by weight of a second resin, wherein the first resin (A1) is a copolymer of a tetrafluoroethylene-perfluoromethyl vinyl ether copolymer of at least one of poly (ethylene terephthalate) and perfluoromethyl vinyl ether (MFA), polytetrafluoroethylene (PTFE), polyamide (PA), thermoplastic polyester elastomer (TPEE), polyphenylene oxide (PPO) and polyethylene terephthalate Wherein the second resin (A2) is selected from the group consisting of thermoplastic polyurethane (TPU), thermoplastic polyurethane grafted maleic anhydride (Ma-g-TPU), polypropylene grafted maleic anhydride (Ma- Ethylene-propylene-diene-mono Ethylene-butadiene-styrene (SEBS), and styrene-ethylene-butadiene-styrene grafted maleic anhydride (Ma-g-EPDM) g-SEBS), and the flame retardant (B) includes (B1) phosphorus flame retardant and (B2) melamine flame retardant.

INDUSTRIAL APPLICABILITY The hot-wire cable for a vehicle seat according to the present invention is excellent in both the bending resistance and the flame retardancy and is excellent in the self-extinguishing property of the hot-wire cable, thereby preventing the transition of fire to the nonwoven fabric of the seat heater, Excellent in workability, excellent in mechanical strength, uniform in heat distribution, and excellent in retention of the internal arrangement structure, stably maintains the internal arrangement against external force, warpage and twist, and is excellent in environmental friendliness, economy and productivity can do.

1 shows a conventional hot-wire cable for a vehicle seat.
2 shows a hot-wire cable for a vehicle seat according to one embodiment of the present invention.
3 shows a hot-wire cable for a vehicle seat according to another embodiment of the present invention.
4 shows a heating cable for a vehicle seat according to another embodiment of the present invention.
Fig. 5 (a) is a photograph showing a sheet heater dipping evaluation result of a hot-wire cable for a vehicle seat according to an embodiment of the present invention, Fig. 5 (b) Of the sheet heater.
Fig. 6 (a) is a photograph showing a result of evaluation of electric wire flame retardancy of a hot-wire cable for a vehicle seat according to an embodiment of the present invention, Fig. 6 This is a photograph showing the result of the wire flame retardance evaluation.
Fig. 7 (a) is a photograph showing the result of evaluating the seat heater flame retardancy of a hot-wire cable for a vehicle seat according to an embodiment of the present invention, Fig. 7 Of the sheet heater.
Fig. 8 shows a method for testing the bendability of a hot-wire cable for a vehicle seat according to the present invention.
Fig. 9 (a) is a photograph of a seat heater test mounted on a hot-wire cable for a vehicle seat according to the present invention, and Fig. 9 (b) shows a test method for the seat heater.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to be exemplary, self-explanatory, allowing for equivalent explanations of the present invention.

One aspect of the present invention relates to a hot wire cable for a vehicle seat. 2 shows a hot-wire cable for a vehicle seat according to one embodiment of the present invention. 2, the heat ray cable 200 for a vehicle seat includes a plurality of unit heat rays 20, and the unit heat rays 20 are in contact with two neighboring unit heat rays 20, a) an array of heat arrays (30) arranged to form a); A center member 40 that is filled (positioned) on the centerline a and supports the heat ray array 30; And a sheath layer 50 surrounding the heat wire array 30. The unit heat wire 20 includes an insulating coating layer 12 surrounding the conductor wire 10 and the conductor wire 10. The heat insulating layer 20 is formed of an insulating coating layer 12,

Conductor line

The conductor line 10 is included for the purpose of generating heat by current flow. As the material of the conductor line 10, a metal alloy having excellent electrical conductivity, bending resistance and durability can be applied. In one embodiment, the conductor wire 10 may include at least one of an alloy wire, a copper wire, an interlocking wire, a stranded wire, a coplanar aluminum wire, and a copper covered steel (CCS). The alloy wire may be made of an alloy containing at least one of magnesium (Mg), zinc (Zn), nickel (Ni), silver (Ag), tin (Sn), zirconium (Zr) and beryllium (Be). When such a conductor wire of the above kind is used, durability, electrical conductivity and bending resistance can be excellent.

In an embodiment, the thickness of the conductor line 10 may be 0.001 mm to 1 mm. It can be excellent in electrical conductivity and thermal conductivity within the above-mentioned thickness range, and excellent in mechanical strength, durability and flexibility.

Insulating coating layer

The insulating coating layer 12 is formed on the surface of the conductor line 10 for the purpose of preventing fire and arc generation. The insulating coating layer 12 may be formed by coating the surface of the conductor line with varnish. The varnish is a paint prepared by dissolving a resin component in a solvent and does not contain a pigment.

The varnish coating may be applied to a substrate such as a silicon varnish, a polyimide varnish, a polyester varnish, a polyesterimide varnish, a polyamideimide varnish, and a polyurethane varnish polyurethane varnish. < / RTI > For example, a polyurethane varnish can be used.

The insulating coating layer 12 may be formed by coating (coating) the surfaces of individual conductor wires or by coating the surfaces of a plurality of conductor wires.

Referring to FIG. 2, in another embodiment of the present invention, the insulating coating layer 12 may be formed to surround a plurality of conductor lines 10. [ For example, 3 to 19 conductor wires 10 may be varnished and coated together in a bundle.

3 shows a hot-wire cable 300 for a vehicle seat according to another embodiment of the present invention. Referring to FIG. 3, the insulating coating layer 12 may be formed so as to surround the individual conductor lines 10, respectively. For example, by coating the individual conductor wires 10 by varnish treatment.

That is, the insulating coating layer 12 may be formed so as to surround the outer circumferential surfaces of the individual conductor wires 10, or may be formed in such a manner as to fill spaces between the outer circumferential surfaces of the plurality of conductor wires 10 and the adjacent conductor wires 10 can do.

In an embodiment, the thickness of the insulating coating layer 12 may be 0.001 mm to 2 mm. The effect of preventing fire and arcing of the present invention can be excellent in the above thickness.

Heat line arrangement

Referring to FIG. 2, a thermal array 30 is arranged so that the unit heat ray 20 forms a center diameter a by contacting two adjacent unit heat rays 20. The unit heat line 20 may include an insulation coating layer 12 surrounding the conductor line 10 and the conductor line 10. The heat line arrangement 30 may include 3 to 10 unit heat lines 20. For example, 4 to 10 may be included.

3, the hot wire array 30 may include a first hot wire array 30 forming the center diameter a and a second hot wire array 34 contacting the first hot wire array 32 have. The second heating array 30 may be formed by arranging two or more unit heating lines 20.

In one embodiment, the second heating array 34 may be one in which two or more unit heating lines 20 are continuously arranged. In the present specification, the term " continuous " means that all the unit heat wires 20 constituting the second heat wire array 34 are arranged in contact with each other as shown in FIG.

In another embodiment, the second hot wire array 34 may be one in which two or more unit hot wires 20 are discontinuously arranged. In the present specification, the term " discontinuous " means that at least one unit heating line arranged in the second heating line array is spaced apart from adjacent unit heating lines, as shown in FIG.

3, the plurality of unit heat wires 20 are closely arranged so that two adjacent unit heat wires 20 are in contact with each other so that the center member 40 and the sheath layer 50, As shown in FIG. As described above, when the center member 40 and the sheath layer 50 are formed apart from each other, the arrangement of the heat ray arrays 30 is stably maintained even when bent or twisted, so that the heat dissipation distribution on the surface can be made uniform.

The plurality of unit heating wires 20 constituting the heating wire arrangement 30 may be twisted to a predetermined number of turns so as to form a spiral. When forming the array with the above structure, the durability and bendability of the heat cable 200 can be improved and the heat dissipation efficiency can be improved.

Center member

2 and 3, the center member 40 is disposed at a center diameter a formed inside the heat wire arrangement 30 and is disposed at a center of the plurality of unit heat wires 20 constituting the heat wire arrangement 30 It is included for the purpose of maintaining homogeneity of heat dissipation distribution and maintaining shape of hot wire cable by supporting uniform arrangement.

In an embodiment, the center member 40 can be a string, a double yarn or a poly yarn. In the present invention, the " string " is a strand of fibers having a predetermined thickness.

For example, polyester fibers, polyolefin fibers, polyarylate fibers or polyamide fibers can be used.

Examples of the polyester fiber include polyethylene terephthalate fiber, polytrimethylene terephthalic acid fiber, polybutylene terephthalate fiber and polyethylene naphthalate fiber. As the polyolefin-based fibers, polyethylene and polypropylene fibers can be used. As a specific example of the polyarylate fiber, a product of vectran (Kuraray Co., Ltd., Japan) can be used. As a specific example of the polyamide-based fiber, a product of Kevlar (DuPont, USA) may be used.

In an embodiment, the thickness of the center member 40 may be 0.001 mm to 2 mm. The effect of maintaining the shape of the hot-wire cable 200 at the above thickness can be excellent.

In one embodiment, a silicon coating layer (not shown) having a thickness of 0.001 mm to 1 mm may be formed on the surface of the center member 40. When the silicon coating layer is included, the arrangement of the heat ray arrays 30 is uniformly maintained, and the heat dissipation distribution can be made uniform.

Sheath layer

Referring to FIGS. 2 and 3, a sheath layer 50 surrounds the hot wire array 30 and is formed using a first composition comprising (A) a base resin and (B) a flame retardant. In the present invention, the thickness of the sheath layer 50 may vary depending on the thickness of the unit heat ray 20. [ For example, 0.01 mm to 5 mm. Hereinafter, the components of the first composition will be described in detail.

The first composition

The first composition comprises (A) a base resin and (B) a flame retardant.

(A) Base resin

The base resin (A) comprises (A1) a first resin and (A2) a second resin. The first resin (A1) is included for the purpose of securing physical properties such as mechanical strength such as elongation and tensile strength, heat resistance and chemical resistance. The first resin (A1) may be a copolymer of terafluoroethylene and perfluoromethyl vinyl ether (MFA), polytetrafluoroethylene (PTFE), polyamide (PA), polytetrafluoroethylene A thermoplastic polyester elastomer (TPEE), polyphenylene oxide (PPO), and polyethylene terephthalate (PET). For example, one or more of polyamide (PA) and thermoplastic polyester elastomer (TPEE).

When a conventional material is used as a base resin, a step of peeling off the coating layer of the hot-wire cable is required, resulting in high workability and cost of sheet heat. However, by using the above polyamide, it is possible to remove the sheet hot wire coating by dipping directly on the lead without stripping the hot wire of the sheet.

In an embodiment, the polyamide resin may be a polymer including PA6, PA10, PA11, PA12, PA610, PA410, PA1010 and an amide bond (-CONH-). These may be used singly or in combination of two or more, but are not limited thereto. For example, one or more of PA 6 and PA 12 can be used.

Or the above-mentioned " polymer containing an amide bond " include PA-6 / 6,6-copolyamide, PA-6/12-copolyamide, PA- PA-6,6 / 10-copolyamide, PA-6,6 / 10-copolyamide, PA-6,6 / The core formed from 6-copolyamide, PA-6 / 6,6 / 6,10-terpolyamide, isophthalic acid, lauric lactam and 3,5-dimethyl-4,4-diamino-dicyclohexylmethylene Polyamide; A copolyamide formed from at least one of isophthalic acid, heptanedicarboxylic acid, and octanedicarboxylic acid and 4,4-diaminodicyclohexylmethane; Caprolactam, isophthalic acid and terephthalic acid, and copolyamides formed from 4,4-diaminodicyclohexylmethane.

The polyamide resin may be a monomer in which a lactam or ω-amino acid having a cyclic structure having a structure of a three-membered ring or more is singly or two or more polycondensed, and diacids and diamines may be used. It is also possible to use homopolyamide, copolyamide and mixtures thereof. The polyamide resin of the present invention may be in the form of one or more of semi-crystalline and amorphous. When the polyamide resin is applied, it is possible to dip the lead wire without peeling the hot wire cable, so that the dipping property of the seat heater can be excellent.

The first resin (A1) is contained in an amount of 70% by weight to 95% by weight based on the total weight of the base resin (A). The flame retardancy, elongation, and flexural resistance can be excellent at the same time when they are included in the weight range. When the first resin (A1) is contained in an amount of less than 70% by weight, the physical strength and flexibility required for the hot-wire cable may deteriorate. When the first resin (A1) is contained in an amount exceeding 95% by weight, the appearance, elongation, . For example, from 75% by weight to 90% by weight. And as another example, 78% by weight to 85% by weight.

The second resin (A2) is included for the purpose of preventing the elongation percentage reduction of the present invention and improving toughness (tensile strength, toughness). The second resin (A2) may be a polar resin or a maleic acid grafted resin.

Examples of the second resin (A2) include thermoplastic polyurethane (TPU), thermoplastic polyurethane grafted maleic anhydride (Ma-g-TPU), polypropylene grafted maleic anhydride (Ma-g-PP) Ethylene-butadiene-styrene (SEBS) and styrene-ethylene-butadiene-styrene grafts, such as ethylene-propylene-diene monomers (EPDM), ethylene-propylene-diene-monomer grafted maleic anhydride And maleic anhydride (Ma-g-SEBS).

In an embodiment, the second resin (A2) may have a glass transition temperature (Tg) of -40 ° C or lower. The low-temperature bending property can be improved under the above conditions.

In an embodiment, the ethylene-propylene-diene-monomer grafted maleic anhydride (Ma-g-EPDM) may have a glass transition temperature (Tg) of -40 ° C or lower. For example, those having a temperature of -46 캜 or lower can be used. Under the above conditions, the low temperature flexibility of the present invention can be excellent.

When the maleic acid grafted resin component of the second resin (A2) is used, the graft ratio may be 0.5% to 25%. In this content, the amide group (N-H) contained in the polyamide resin or the like and the maleic anhydride can be easily combined to provide excellent durability, flexibility and low-temperature bending property.

When the styrene-ethylene-butadiene-styrene (SEBS) is used as the second resin (A2), the first resin (A1) having a polarity can be used.

In an embodiment, the second resin (A2) is selected from the group consisting of ethylene-propylene-diene-monomer grafted maleic anhydride (Ma-g-EPDM) and styrene-ethylene-butadiene- styrene grafted maleic anhydride (Ma- In a weight ratio of 1: 0.5 to 1: 2. When the weight ratio is included, the elongation percentage, the flame retardancy, and the low temperature flexibility can be simultaneously excellent.

The second resin (A2) is contained in an amount of 5% by weight to 30% by weight based on the total weight of the base resin (A). When included in the above weight range, the appearance, elongation and toughness can be ensured. For example, 10% by weight to 25% by weight. For example from 15% to 22% by weight.

(B) Flame retardant

The flame retardant (B) is included for the purpose of securing the flame retardancy, heat resistance and self-combustibility of the heat ray cable of the present invention and preventing fire from being transferred to a seat heater on which the heat ray cable is installed in case of fire.

The flame retardant (B) includes (B1) phosphorus flame retardant and (B2) melamine flame retardant.

The main mechanism of the phosphorus flame retardant (B1) is to promote the formation of char by trans esterification, dehydration, dehydroxylation and carbonization, Thereby physically blocking the heat transfer to the inside of the polymer resin component and the supply of fuel to the combustion region on the surface. In an embodiment, the phosphorus flame retardant (B1) may comprise a structure of the following formula:

[Chemical Formula 1]

(Wherein, R ₁ and R ₂ are each independently a linear or branched C ₁ to C ₆ alkyl group or a C ₆ to C ₁₀ aryl group, and M is at least one selected from the group consisting of magnesium (Mg), Calcium (Ca), aluminum (Al) or zinc (Zn), and n is an integer of 1 to 3.

In one embodiment, the phosphorus flame retardant (B1) is selected from the group consisting of aluminum trisdiethylphosphinate, aluminum trismethylethylphosphinate, aluminum trisdiphenylphosphinate, But are not limited to, zinc bisdiethylphosphinate, zinc bismethylethylphosphinate, zinc bisdiphenylphosphinate, titanyl bisdiethylphosphinate, At least one of titanyl bismethylethylphosphinate and titanyl bisdiphenylphosphinate may be used in combination. [0034] The term " a "

In one embodiment, the phosphorus flame retardant (B1) may have a phosphorus atom content of 20% or more. Excellent flame retardancy can be secured in the above range. For example, the content of phosphorus atoms may be 20% to 45%.

The melamine-based flame retardant (B2) secures flame retardancy by using a mechanism in which an endothermic reaction occurs when the melamine component is decomposed at the time of heat transfer. The melamine-based flame retardant (B2) is less toxic than halogen, is easy to handle, and generates little smoke.

In one embodiment, the melamine flame retardant (B2) may be selected from melamine cyanurate, melamine pyrophosphate, melamine polyphosphate, melamine pyrophosphate metal salt, melamine pyrophosphate metal salt, and cyclic benzyl phosphate. .

When the phosphorus flame retardant (B1) and the melamine flame retardant (B2) are used together, a very excellent flame retardant effect can be exhibited by nitrogen and phosphorus components, and tensile strength and elongation can be prevented from lowering.

In one embodiment, the average size of the flame retardant (B) may be between 0.1 μm and 20 μm. As used herein, the term " size " means the maximum length. When the flame retardant in the above range is included, the flame retardant component can be easily dispersed in the base resin (A), and the flexural resistance and flexibility of the sheath layer can be excellent. For example, a flame retardant (B) having an average size of 0.5 μm to 10 μm can be used.

The flame retardant (B) may be one obtained by surface-treating the above-mentioned components. The surface treatment is included to ensure the water resistance of the present invention and the compatibility with the resin component. In an embodiment, the surface treatment may be performed by coating the surface of the flame retardant (B) with at least one of a silicone-based coupling agent, a titanate-based coupling agent, a higher fatty acid, a metal hydrate (metal hydroxide), an amine and a metal salt of an amine. In embodiments, the higher fatty acid may comprise one or more of stearic acid, oleic acid, palmitic acid and behenic acid. As described above, when the flame retardant (B) is surface-treated, compatibility, water resistance, and physical strength can be secured at the same time.

In this case, the average size of the surface-treated first filler may be 0.01 탆 to 2 탆, and the specific surface area (BET method) may be 5 mm 2 / g to 100 mm 2 / g. For example, the average size may be 0.1 탆 to 1 탆, and the specific surface area may be 5 mm 2 / g to 50 mm 2 / g. Within the above range, the dispersibility, moldability and mechanical strength of the present invention can be excellent. In the present specification, the " size " means the maximum length.

In an embodiment, the flame retardant (B) is contained in an amount of 15 to 60 parts by weight based on 100 parts by weight of the base resin (A). When the content is within the above range, the lead dipping property and the flame retardancy are excellent while the elongation, durability, and bending property are not lowered, and no harmful gas is generated. When the flame retardant (B) is contained in an amount less than 15 parts by weight, it is difficult to ensure flame retardancy. When the flame retardant (B) is contained in an amount exceeding 60 parts by weight, 50 are expanded to form a blast-resistant upper-end layer to lower the solderability. The thickness of the blast-resistant upper layer increases, the solderability of the hot-wire cable is lowered, and the elongation and durability may be lowered. For example, 18 parts by weight to 55 parts by weight. And as another example, 25 to 45 parts by weight.

In one embodiment, the phosphorus flame retardant (B1) and the melanin flame retardant (B2) may be contained in a weight ratio of 1: 0.1 to 1:10. When the content is within the above range, the lead dipping property and the flame retardancy are excellent while the elongation, durability, and bending property are not lowered, and no harmful gas is generated.

In one embodiment, the phosphorus flame retardant (B1) may be included in an amount of 20 to 35 parts by weight based on 100 parts by weight of the base resin (A), and the melanin flame retardant (B2) may be included in an amount of 3 to 15 parts by weight .

In another embodiment, the phosphorus flame retardant (B1) may be included in an amount of 3 to 15 parts by weight, and the melanin type flame retardant (B2) may be included in an amount of 20 to 35 parts by weight. When the content is within the above range, the lead dipping property and the flame retardancy are excellent while the elongation, durability, and bending property are not lowered, and no harmful gas is generated.

In another embodiment of the present invention, the first composition may further comprise (C) an antioxidant and (D) a lubricant.

(C) Antioxidant

The antioxidant (C) may be included in the present invention for the purpose of preventing aging and deterioration. In an embodiment, the antioxidant may include at least one of phenol, phosphorus, sulfur, amine and metal antioxidants.

Examples of the phenolic antioxidants include sterically hindered phenolic stabilizers such as alkylated monophenol compounds, alkylthiomethylphenol compounds, hydroquinone compounds, alkylated hydroquinone compounds, tocopherol compounds, A thiodiphenyl ether compound and an alkylidene bisphenol compound.

The phosphorus antioxidant may include at least one of a phosphorus-based ester compound and an aromatic phosphine compound.

Examples of the amine antioxidant include N, N'-diisopropyl-p-phenylenediamine, N, N'-di-tert-butylphenylenediamine, N, N'-bis (1,4-dimethylpentyl) phenylenediamine, N, N'-bis (1-methylheptyl) -p-phenylenediamine, N, N'- , N'-dicyclohexyl-p-phenylenediamine, N, N'-diphenyl-p-phenylenediamine, N, N'-bis (2-naphthyl) Phenyl-p-phenylenediamine, N- (1-methylheptyl) -N'-phenyl-p-phenylenediamine, N- Phenylenediamine, 4- (p-toluenesulfonamido) diphenylamine and N, N'-dimethyl-N, N'-di- Butyl-p-phenylenediamine.

Examples of the sulfur-based antioxidant include diaryl 3,3-thiodipropionate, diimylstil 3,3'thiodipropionate, diastereiryl 3,3-thiodipropionate, laurylstearyl 3 , 3-thioiodipropionate, pentaerythritol-tetrakis- (beta lauryl-thio-propionate) and 3,9-bis (2-dodecylthioethyl) 10-tetraoxaspiro [5,5] undecane. ≪ / RTI >

The metal-based antioxidant may include at least one of a copper-based antioxidant, a molybdenum-based antioxidant, lead chloride, magnesium chloride, and zinc chloride.

In an embodiment, the antioxidant (C) may be included in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the base resin (A). Within the above range, the effect of preventing aging and deterioration can be excellent without impairing the physical properties of the present invention. For example, 1.5 to 5 parts by weight. For example, 1.5 to 3 parts by weight.

(D) a lubricant

The lubricant (D) improves the dispersibility when mixing the first composition component and enhances the dispersibility of the flame retardant (B) component to improve processability. In one embodiment, the lubricant (D) may include at least one of ester, silicone, fatty acid and amide lubricants.

Examples of the ester-based lubricant include butyl stearate, glycerol monostearate, and montan wax. The montanic wax may be a mixture of straight-chain saturated carboxylic acids having a chain length of 28 to 32 carbon atoms.

As the silicone type lubricant, silicone oil, silicone wax, or the like can be used. The silicone wax may mean an alkyl dimethicone compound having 30 to 45 carbon atoms. In an embodiment, the silicone wax may be used in the form of a master batch mixed with the first resin (A).

The fatty acid-based lubricant may include at least one of stearic acid, oleic acid, an animal higher fatty acid, and a vegetable higher fatty acid. For example, it may include at least one of butyl stearate, glycerol mono stearate, glycerine monooleate and stearyl stearate.

Examples of the amide-based lubricant include zinc-amide-based lubricants, ethylene-bis-stearamide, ethylenebis (oleamide), and erucamide. Or the like.

In one embodiment, ester lubricants and silicone lubricants can be used as the lubricant (D). More specifically, montan wax and silicone wax can be used. When the lubricant of the above kind is used, it is excellent in external appearance and lubricity, and the dispersibility of the flame retardant (B) component is excellent, and the workability can be improved.

The lubricant (D) may be included in an amount of 0.1 to 5 parts by weight per 100 parts by weight of the base resin (A). When the content is in the above range, it is excellent in appearance and lubricity, and the dispersibility of the flame retardant (B) component is excellent, and the workability can be improved. For example, 0.3 part by weight to 3 parts by weight. For example, 0.5 to 2 parts by weight.

In another embodiment of the present invention, the first composition may further comprise (E) an anti-drip agent. The dripping inhibitor (E) prevents dripping (dropping) at the time of combustion, and in the specific example, polytetrafluoroethylene (PTFE) can be used. In one embodiment, the drip inhibitor may be included in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the base resin (A). The drip-preventing effect can be excellent in the above range.

Another aspect of the present invention relates to a method of manufacturing a hot-wire cable for a vehicle seat. The method for manufacturing a hot-wire cable for a vehicle seat includes the steps of: (a) (b) hot wire array formation step; And (c) forming a sheath layer. More specifically, the manufacturing method includes: manufacturing a plurality of unit heat wires; Forming an array of heat lines on the outer surface of the center member such that the unit heat lines are in contact with two neighboring unit heat lines; And forming a sheath layer surrounding the hot wire array.

Hereinafter, the method for manufacturing a hot-wire cable for a vehicle seat will be described step by step.

(a) Unit heat ray manufacturing stage

In this step, an insulating coating layer 12 is formed on the surface of the conductor line 10 to manufacture a plurality of unit heat wires 20. [ The insulating coating layer 12 may be formed by varnish coating the surface of the conductor line 10 using the above-described components.

Referring to FIG. 2, the insulating coating layer 12 may be formed to surround a plurality of conductor lines 10. [ For example, 3 to 19 conductor wires 10 may be coated with a varnish by coating with a bundle.

3, the insulating coating layer 12 may be formed so as to surround the outer circumferential surfaces of the individual conductor wires 10, or may be formed in such a manner that a space between the outer circumferential surfaces of the plurality of conductor wires 10 and the adjacent conductor wires 10 It can be formed in a filling form.

(b) heat ray array formation step

The above step is a step of arranging (arranging) the heat ray arrangement 30 by arranging the manufactured unit heat ray on the outer circumferential surface of the center member 40 so as to be in contact with two neighboring unit heat ray. Referring to FIG. 2, the unitary hot wire may be arranged on the outer circumferential surface of the center member 40 so as to be adjacent to two adjacent unit hot wires to form a hot wire array. The heat line array 30 may include 3 to 10 unit heat lines 20.

3, the hot wire array includes a first hot wire array 32 and a second hot wire array 37 contacting the outer circumferential surface of the center member 40 (forming the center diameter a) 34, respectively. In an embodiment, the second hot wire array 34 may be formed by arranging two or more unit hot wires 20.

In one embodiment, the second hot wire array 34 may continuously array two or more unit hot wires 20.

In another embodiment, the second hot wire array 34 may dispose more than one unit hot wire 20 discontinuously.

2 and 3, the plurality of unit heat wires 20 are closely arranged so that two adjacent unit heat wires 20 are in contact with each other, so that the center member 40 and the sheath layer 50 are arranged in a hot wire arrangement And can be formed to be spaced apart from each other. As described above, when the center member 40 and the sheath layer 50 are formed apart from each other, the arrangement of the heat ray arrays 30 is stably maintained even when bent or twisted, so that the heat dissipation distribution on the surface can be made uniform.

In the embodiment, the plurality of unit heat wires 20 may be arranged to be twisted to a predetermined number of turns so as to form a spiral when the heat ray array 30 is formed. When arranged in the above-described structure, the durability and bendability of the hot-wire cable 200 can be improved and the heat-dissipating efficiency can be excellent.

In an embodiment, the thickness of the center member 40 may be 0.001 mm to 2 mm. The effect of maintaining the shape of the hot-wire cable 200 at the above thickness can be excellent. In one embodiment, a silicon coating layer (not shown) having a thickness of 0.001 mm to 1 mm may be formed on the surface of the center member 40. When the silicon coating layer is included, the arrangement of the heat ray arrays 30 is uniformly maintained, and the heat dissipation distribution can be made uniform.

(c) Cis layer formation step

This is the step of forming the sheath layer 50 surrounding the hot wire array 30. 2 and 3, a first composition including 100 parts by weight of a base resin (A) and 15 parts by weight to 60 parts by weight of a flame retardant (B) is coated on the outer surface of the hot wire array 30, .

Wherein the base resin (A) comprises (A1) 70 wt% to 95 wt% of a first resin and (A2) 5 wt% to 30 wt% of a second resin, wherein the first resin (A1) ), Thermoplastic polyester elastomer (TPEE), polyphenylene oxide (PPO) and polyethylene terephthalate (PET), wherein the second resin (A2) comprises at least one of thermoplastic polyurethane (TPU), thermoplastic polyurethane Maleic anhydride (Ma-g-TPU), polypropylene grafted maleic anhydride (Ma-g-PP), ethylene-propylene-diene-monomer (EPDM), ethylene-propylene-diene-monomer grafted maleic anhydride (B) is at least one of styrene-ethylene-butadiene-styrene (Ma-g-EPDM), styrene-ethylene-butadiene-styrene (SEBS), and styrene-ethylene-butadiene-styrene grafted maleic anhydride (B1) phosphorus flame retardant and (B2) melamine flame retardant. The base resin (A) and the flame retardant (B) can be applied as the above-mentioned components and contents.

The first composition may further comprise (C) an antioxidant and (D) a lubricant of the aforementioned components and contents.

The first composition is melted and kneaded at a temperature of 150 ° C to 250 ° C using a twin-screw extruder in the above-described components and contents, cooled, and then a first extrudate is prepared, and the first extrudate is subjected to strand cutting to produce pellets .

In order to prevent the flame retardant and other additives contained in the pellets from being poured into one side, the pellets (entire lot) may be dry-blended to improve dispersibility. The dry blend may be blended at 50 ° C to 90 ° C for about 2 hours to dry the pellets.

In order to improve the dispersibility of the first composition component, the resin may be pulverized or freeze-pulverized into a powder form and then introduced into a biaxial mixer. When the resin is pulverized, the working temperature condition can be lowered, and the particle size with the flame retardant and other additives is similar, and the dispersibility can be improved. When the resin is not pulverized, the blended pellets may be further kneaded to improve dispersibility in order to improve dispersibility.

Hereinafter, the configuration and operation of the present invention will be described in more detail with reference to preferred embodiments of the present invention. However, the following examples are provided to aid understanding of the present invention, and the scope of the present invention is not limited to the following examples. The contents not described here are sufficiently technically inferior to those skilled in the art, and a description thereof will be omitted.

Example

Examples 1 to 17 and Comparative Examples 1 to 18

Examples 1 to 17 and Comparative Examples 1 to 18 Specific specifications of the first composition used for forming the sheath layer are as follows.

(A) Base resin

(A1) First resin: PA12 (manufactured by Arkema AECNO TL) having a melting point of 183 DEG C was used as the polyamide resin. (A12) An ARNITEL product of DSM, which has a melt flow index of 30 g / 10 min, was used as a thermoplastic polyethylene elastomer (TPEE).

(A2) Second resin: (A21) Ethylene-propylene-diene monomer graft maleic acid (Ma-g-EPDM) having a graft ratio of maleic anhydride of 20% and a glass transition temperature (Tg) Respectively. (A23) An ethylene-propylene-diene monomer (EPDM) having a glass transition temperature (Tg) of -46 ° C was used. (A23) A maleic anhydride grafting rate of 20%, a melt index of 1.5 g / 10 min, Styrene-butadiene-styrene grafted maleic acid (Ma-g-SEBS) having a molecular weight (A) of 70 or less was used. (A24) Styrene-ethylene-butadiene-styrene having a melt index of 1.5 g / 10 min and a Shore hardness (A) of 70 or less was used. (A25) thermoplastic polyurethane was used.

(B) Flame retardant

(B1) Aluminum tris diethylphosphinate having an average size of 1 占 퐉 was used as a phosphorus flame retardant. (B2) Melamine cyanurate having an average size of 1 占 퐉 was used as a melamine-based flame retardant.

(C) Antioxidant

(C1) Irganox 245 manufactured by Ciba Inc. was used as a phenol antioxidant. (C2) Irganox 168 manufactured by Ciba Inc. was used as an antioxidant. (C3) Irganox 412 manufactured by Ciba Inc. was used as a sulfur-based antioxidant.

(D) a lubricant

(D1) Silicone wax was used as a silicone lubricant. (D2) ester-based lubricant, montane wax was used.

(E) A PTFE dripping inhibitor was used as an anti-drip agent.

Hot wire cable manufacturing

A conductor wire 10 made of a magnesium-zinc (Mg-Zn) alloy was drawn to a diameter of 0.051 mm, and the four conductor wires 10 were collected and varnish-coated using a polyurethane varnish to form the four conductor wires 10 ) Were formed on the insulating coating layer (12).

As shown in FIG. 2, a vortran (Japan kuraray), which is a polyarylate fiber in the form of a bundle and in which a silicon coating layer is formed by a central member 40, is prepared. And arranged in a predetermined number of turns such that they are in contact with the two unit heat lines to form a heat line array 30. [

The first composition was melted and kneaded at a temperature of 150 ° C to 250 ° C using a twin-screw extruder with the components and contents shown in Tables 1 to 3 below and cooled to prepare a first extrudate. The first extrudate was cut in a strike To prepare pellets.

Then, to prevent the flame retardant and other additives contained in the pellets from being burnt to one side, the pellets (whole lot) were dry blended at 50 ° C to 90 ° C for about 2 hours, A 2 mm thick sheath layer surrounding the outside of the hot wire array is formed by extrusion so that the unit hot wire 20 constituting the hot wire array 30 is closely arranged so as to come into contact with two adjacent unit heat wires, The sheath layers 50 were formed to be spaced apart from each other by a heat line arrangement.

The following items were evaluated for the hot wire cables of Examples 1 to 17 and Comparative Examples 1 to 18, and the results are shown in Tables 4 to 7 below.

(1) Appearance inspection: The appearance of the hot-wire cables of the examples and the comparative examples was visually observed, and when the surface was smooth and scratches and cracks were not generated, the surface roughness was judged as x when scratches or cracks occurred.

(2) Dipability (Solderability): With respect to the lead wires of the examples and the comparative examples, the lead wires of the lead wires of the examples and the comparative examples were removed by heating to confirm that the lead was easily soldered to the inner conductor. Poor: It was judged as Fail.

(3) Elongation: The hot-wire cable specimens of the above-described Examples and Comparative Examples were vertically stretched at a speed of 200 mm / min using a material testing machine. The result is measured by measuring the elongation length based on the gauge, and converting it to% of the gauge 20 mm to measure the elongation. Pass at 200% or more and Fail at 200% or less.

(4) Flexibility: The hot-wire cable test specimens of the above-mentioned Examples and Comparative Examples were installed as shown in Fig. 8 and subjected to a load of 912 g under the conditions of a bending angle of 180 degrees and a speed of 50 turns / min. When the number of circuits was measured, the wire was bent more than 200,000 times. If the wire of the hot-wire cable conductor did not occur, the failure was judged to be a failure when the conductor wire was broken.

(5) Low-temperature Flexibility: The hot-wire cable specimens of the above-described Examples and Comparative Examples were vertically cooled in a low-temperature bath at -50 ± 2 ° C for 3 hours, taken out and wound three times on a round bar having a diameter equal to or smaller than 5 times , Check whether the surface of the wire is uniform, and if there is a disconnection in the conductor cable of the hot wire cable by conducting the underwater withstand voltage test.

(6) Wire Flame Retardancy: The hot-wire cable specimens of the above-mentioned Examples and Comparative Examples were supported horizontally with a length of about 300 mm, and the flame was slowly removed until the front end of the flame source was burned to the bottom of the center of the sample within 30 seconds. Pass was determined to be within 15 seconds of extinguishing time, and Fail was judged to exceed 15 seconds.

(7) Seat heater Flame retardancy: A sheet heater was produced as shown in Fig. 9 (a) using the hot-wire cable specimens, non-woven fabric, and yarn, etc. of the above-mentioned Examples and Comparative Examples, The flame retardancy was evaluated. 9 (b), the ignition should be extinguished within the area indicated by the line A (38 mm) in FIG. 9 (b). When the area exceeds the line A, the ignition is turned off within 60 seconds , Pass when the combustion length is 50 mm or less, and Fail if the conditions are not satisfied.

(8) Judgment result: If all the evaluation items meet the criteria, pass. If any of the evaluation items are not satisfied, it is evaluated as Fail.

Fig. 5 (a) is a photograph showing the sheet heater dipping evaluation result of the hot-wire cable for a vehicle seat according to the first embodiment of the present invention, Fig. 5 Of the cable heater.

Fig. 6 (a) is a photograph showing a wire flame retardance evaluation result of a hot-wire cable for a vehicle seat according to a first embodiment of the present invention, Fig. 6 This is a photograph showing the evaluation result of cable flame retardancy.

Fig. 7 (a) is a photograph showing the result of evaluating the seat heater flame retardancy of a hot-wire cable for a vehicle seat according to the first embodiment of the present invention, Fig. 7 Fig. 6 is a photograph showing the evaluation results of the seat heater flame retardancy of the cable of Fig.

5 to 7, and Tables 4 to 7, Examples 1 to 17 showed excellent extensibility, flexibility, low-temperature bending property and flame retardancy, and in particular, both the heat ray cable and the seat heater were flame retardant Respectively.

1, 10: conductor line 2, 12: insulating coat layer
3: tensile member 4, 50: sheath layer
11, 20: unit heating wire 40: center member
30: Hot line array 32: First hot line array
34: 2nd heat line array
100, 200, 300, 400: Hot wire cable for vehicle seat
a: center of gravity

Claims (16)

An array of heat lines including a plurality of unit heat lines and arranged so that the unit heat lines contact with neighboring two unit heat lines to form a central diameter;
A center member filled in the center diameter and supporting the heat wire arrangement; And
And a sheath layer surrounding the hot wire array,
Wherein the unit thermal line includes a conductor line and an insulation coating layer surrounding the conductor line,
Wherein the sheath layer is formed from a first composition comprising (A) 100 parts by weight of a base resin and (B) 15 parts by weight to 60 parts by weight of a flame retardant,
Wherein the base resin (A) comprises (A1) 70 wt% to 95 wt% of a first resin and (A2) 5 wt% to 30 wt% of a second resin,
The first resin (A1) may be selected from the group consisting of tetrafluoroethylene-perfluoromethyl vinyl ether (MFA), polytetrafluoroethylene (PTFE), polyamide (PA), thermoplastic poly At least one of an ester elastomer (TPEE), a polyphenylene oxide (PPO), and a polyethylene terephthalate (PET)
The second resin (A2) may be selected from the group consisting of thermoplastic polyurethane (TPU), thermoplastic polyurethane grafted maleic anhydride (Ma-g-TPU), polypropylene grafted maleic anhydride (Ma- Ethylene-butadiene-styrene (SEBS), and styrene-ethylene-butadiene-styrene grafted maleic anhydride (MA-g-EPDM) (Ma-g-SEBS)
Wherein the flame retardant (B) comprises (B1) phosphorus flame retardant and (B2) melamine flame retardant.
delete The vehicle seat according to claim 1, wherein the polyamide (PA) comprises at least one of PA6, PA10, PA11, PA12, PA610, PA410, PA1010 and a polymer containing an amide bond (-CONH-) Hot wire cable.
The hot-wire cable for a vehicle seat according to claim 1, wherein the phosphorus flame retardant (B1) and the melanin flame retardant (B2) are contained in a weight ratio of 1: 0.1 to 1:10.
The method according to claim 1, wherein the second resin (A2) is selected from the group consisting of ethylene-propylene-diene-monomer grafted maleic anhydride (Ma-g-EPDM) and styrene-ethylene-butadiene-styrene grafted maleic anhydride -SEBS) in a weight ratio of 1: 0.5 to 1: 2.
The heat ray cable for a vehicle seat according to claim 1, further comprising (C) 0.1 to 10 parts by weight of an antioxidant and (D) 0.1 to 5 parts by weight of a lubricant, based on 100 parts by weight of the base resin .
The antioxidant (C) according to claim 6, wherein the antioxidant (C) comprises at least one selected from phenol, phosphorus, sulfur, amine and metal antioxidants,
Wherein the lubricant (D) comprises at least one of ester, silicone, fatty acid and amide lubricants.
The conductive wire according to claim 1, wherein the conductor wire includes at least one of an alloy wire, a copper wire, a peristaltic wire, an interlocking strand, a coplanar aluminum wire,
Wherein the alloy wire is made of an alloy containing at least one of magnesium (Mg), zinc (Zn), nickel (Ni), silver (Ag), tin (Sn), zirconium (Zr) and beryllium (Be) Hot wire cable for vehicle seat.
The hot-wire cable for a vehicle seat according to claim 1, wherein the insulating coating layer is formed by coating the surfaces of individual conductor wires or coating the surfaces of a plurality of conductor wires.
2. The hot-wire cable of claim 1, wherein the center member comprises fibers in the form of a string, a double yarn or a poly yarn.
2. The method of claim 1, wherein the hot wire array comprises a first hot wire array forming a central diameter and a second hot wire array contacting the first hot wire array,
Wherein the second heating wire array is formed by arranging at least two unit heating wires.
12. The hot-wire cable for a vehicle seat according to claim 11, wherein the second hot-wire array has two or more unit heating wires arranged continuously.
12. The hot-wire cable for a vehicle seat according to claim 11, wherein the second hot-wire array has two or more unit hot-wire lines arranged discontinuously.
The apparatus of claim 1, wherein the plurality of unit heat wires are closely arranged so that two adjacent unit heat wires are in contact with each other,
Wherein the central member and the sheath layer are spaced apart from each other by the hot wire arrangement.
Manufacturing a plurality of unit heat wires;
Arranging the unitary heating wires on the outer surface of the center member so as to contact with adjacent two unit heating wires to form a heating wire arrangement; And
Forming a sheath layer surrounding the hot wire array,
Wherein the unit thermal line includes a conductor line and an insulation coating layer surrounding the conductor line,
The sheath layer is formed using a first composition comprising (A) 100 parts by weight of a base resin and (B) 15 to 60 parts by weight of a flame retardant,
Wherein the base resin (A) comprises (A1) 70 wt% to 95 wt% of a first resin and (A2) 5 wt% to 30 wt% of a second resin,
The first resin (A1) may be selected from the group consisting of tetrafluoroethylene-perfluoromethyl vinyl ether (MFA), polytetrafluoroethylene (PTFE), polyamide (PA), thermoplastic poly At least one of an ester elastomer (TPEE), a polyphenylene oxide (PPO), and a polyethylene terephthalate (PET)
The second resin (A2) may be selected from the group consisting of thermoplastic polyurethane (TPU), thermoplastic polyurethane grafted maleic anhydride (Ma-g-TPU), polypropylene grafted maleic anhydride (Ma- Ethylene-butadiene-styrene (SEBS), and styrene-ethylene-butadiene-styrene grafted maleic anhydride (MA-g-EPDM) (Ma-g-SEBS)
Wherein the flame retardant (B) comprises (B1) a phosphorus flame retardant and (B2) a melamine flame retardant.
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